1. Too long computer use is the key to hair loss:

If you concentrate on using the computer for too long, the excitement of your brain will increase, and endocrine will be disordered. Excessive secretion of sebaceous glands connected with hair follicles will lead to hair follicle embolism, hair nutrition supply will be hindered, hair quality will become brittle and hair will fall off. For slight hair loss, it can be alleviated by reducing the use time of computers and adjusting lifestyle.

2. The light emitted by computer screen contains a lot of high-energy short-wave blue light with irregular frequency, which has extremely high energy and can penetrate the lens and reach the retina.

blue light will produce free radicals, which will lead to the decline of retinal pigment epithelial cells, and the decline of epithelial cells will lead to the lack of nutrients in photosensitive cells, which will cause visual damage. These "inappropriate lights" are the chief culprit of a large part of senile blindness-macular disease (AMD).

Extended information:

1. Radiation principle:

Radiation radiates outward in the form of electromagnetic waves and particles (such as alpha particles and beta particles). Radio waves and light waves are electromagnetic waves. Their propagation speed is very fast, and the propagation speed in vacuum is the same as that of light waves (3× 1 8 m/s).

2. Main classification:

Visible light also belongs to radiation, which can generally be classified as ionizing radiation or non-ionizing radiation according to its energy level and the ability of ionized substances. This term is generally used in ionizing radiation.

ionizing radiation has enough energy to ionize atoms or molecules, while non-ionizing radiation does not. Radioactive substances refer to substances that can emit ionizing radiation. There are three main types of ionizing radiation: α, β and γ radiation (or rays).

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